actually I am very correct. You might be technically a tax resident after 180 days in Thailand, but that does not mean you automatically must file. Far from it.
If you don't actually do any work in Thailand then don't worry about it. Thailand trusts that you paid your income tax on any money you bring in, until you prove them wrong. If you actually make money working in Thailand, not remote work, then you file Thai income tax.
passports are incidental. All someone's full history in Thailand is by facial recognition, and fingerprint/thumb print, at immigration. Overstay history is flagged in what comes up on their screens.
Go to the Bangkok Bank main branch on SiLom road, then after getting an account there also get one at Kasikorn Bank. It is very convenient to have more than one account at different banks.
don't believe all that hype. Thailand trusts you paid income tax on any money you bring into Thailand, until you prove them wrong, especially concerning retirement. All Thailand cares about is that there is a paper trail of all the money you bring here.